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Taiwan Semiconductor Corporation 1.5SMC120CH
- Part No.:
- 1.5SMC120CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CH.pdf
- Description:
- 1500W, 120V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,786
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Product details
Overview
1.5SMC120CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 108–132V breakdown voltage (VBR), and 97.2V working stand-off voltage (VWM). It provides ESD and surge protection for automotive power lines, industrial I/O ports, and telecom interfaces requiring fast clamping (<1.0 ps response) and low leakage (<1 µA at VWM).
For engineers reviewing the 1.5SMC120CH datasheet, 1.5SMC120CH pinout, 1.5SMC120CH application, or 1.5SMC120CH equivalent, this page delivers verified electrical specs, clamping performance (173V @ 9.1A), thermal resistance (RθJA = 50°C/W), AEC-Q101 qualification status, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance - all critical for automotive-grade transient suppression design.
Technical Context
The 1.5SMC120CH employs a glass-passivated silicon junction optimized for high-energy transient absorption in unidirectional configurations. Its clamping voltage of 173V at 9.1A IPPM ensures robust overvoltage protection while maintaining low forward voltage (VF = 5.0V @ 50A) for minimal conduction loss during surge events.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and complies with ISO 7637-2 for load-dump and switching transient immunity. Its DO-214AB package supports automated placement and achieves RθJC = 15°C/W for effective heat dissipation under pulsed conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 108 V / 132 V - defines minimum and maximum voltage at which device enters avalanche breakdown under 1 mA test current; sets clamping threshold range |
| VWM | 97.2 V - maximum continuous reverse operating voltage before significant leakage; must exceed system nominal voltage (e.g., 24V or 48V bus) |
| VC @ IPPM | 173 V @ 9.1 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure level |
| PPK | 1500 W - peak pulse power handling capability per single 1 ms waveform; enables protection against high-energy transients like ISO 7637-2 Pulse 5a |
| IR @ VWM | <1 µA - reverse leakage current at rated stand-off voltage; ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures |
| RθJA | 50 °C/W - junction-to-ambient thermal resistance; informs PCB copper area and airflow requirements for sustained power dissipation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (for unidirectional use) | Connected to protected line (e.g., battery feed); conducts during forward surge only if used in bidirectional configuration with external components |
| Cathode | Clamp reference / Ground side | Connected to system ground or low-impedance return path; carries full surge current during reverse-biased clamping event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, HAST, and UHAST - enables use in engine control, body electronics, and ADAS modules |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation - eliminates need for additional filtering stages |
| Fast response time | <1.0 ps - ensures clamping initiates before sensitive downstream ICs experience overvoltage stress, critical for CAN/LIN bus protection |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity exposure - improves field lifetime in harsh environments |
| DO-214AB mechanical robustness | UL 94V-0 molding compound and JESD201 Class 2 whisker resistance support high-reliability automated assembly and extended service life |
Applications
| Automotive Power Line Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting 24V/48V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges above 97.2V. Use Value: Limits peak voltage to 173V during 9.1A transients, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shielding programmable logic controller digital input channels from ESD and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Standoff protector on 24V DC input lines, absorbing ±8kV contact ESD per IEC 61000-4-2 and 100A surge pulses. Use Value: Sub-1µA leakage preserves signal integrity; 1500W rating handles repetitive switching transients without derating. |
| Telecom Interface Surge Suppression | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding Ethernet PHY power rails and RS-485 transceiver VCC pins against lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Primary clamping device on 3.3V/5V supply lines, coordinated with secondary GDT or MOV for multi-stage protection. Use Value: 173V clamping voltage prevents latch-up in 5V-tolerant PHYs; AEC-Q101 grade ensures reliability in uncontrolled ambient conditions. | Use Scenario: Protecting microcontroller GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in home appliances. IC Role / Device Role / Timing Role: Bidirectional-capable TVS (via CH suffix) placed across motor terminals or driver outputs to absorb flyback energy. Use Value: 108–132V VBR range matches typical 120VAC rectified bus voltages; fast <1ps response avoids MOSFET avalanche failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | 600W rating (vs. 1500W), SMB package (smaller footprint), VC = 193V @ 3.1A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current load dump | Select when space-constrained and surge energy ≤600W; verify clamping margin with system VMAX |
| 1.5KE120A | Through-hole DO-201 package, same 1500W rating, VC = 173V @ 8.7A, higher RθJA (~65°C/W) | Requires manual or wave soldering; less suitable for high-volume SMT lines; thermal performance inferior on dense PCBs | Choose for legacy through-hole designs or where reflow compatibility is not required |
Compared with SMBJ120A and 1.5KE120A, the 1.5SMC120CH offers superior surge handling in an SMT-optimized package with AEC-Q101 validation - making it the preferred choice for new automotive and industrial designs demanding high-reliability, high-power transient suppression.
Availability
1.5SMC120CH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom interface surge suppression requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for 1.5SMC120CH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 certified product lines.
The 1.5SMC series was developed specifically for high-energy, surface-mount transient suppression in automotive and industrial environments - emphasizing robust clamping, fast response, and process reliability for automated manufacturing.
FAQ
What is the clamping voltage of the 1.5SMC120CH and how is it measured?
The 1.5SMC120CH has a maximum clamping voltage (VC) of 173 V at 9.1 A peak pulse current (IPPM), tested using the 10/1000 µs standard surge waveform per Fig.5 in the datasheet. This value represents the upper limit of voltage seen by downstream circuitry during a defined transient event and is critical for ensuring protected ICs remain within absolute maximum ratings.
Is the 1.5SMC120CH suitable for bidirectional transient protection?
No - the 1.5SMC120CH is a unidirectional TVS diode. For bidirectional protection, Taiwan Semiconductor specifies the 1.5SMC120CAH variant (with CAH suffix). The CH suffix indicates cathode-anode polarity orientation for unidirectional operation; using 1.5SMC120CH in reverse-biased AC applications will not provide symmetrical clamping.
Does the 1.5SMC120CH meet automotive qualification standards?
Yes - the 1.5SMC120CH is AEC-Q101 qualified and compliant with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. These certifications confirm its suitability for automotive powertrain, chassis, and body electronics where reliability under thermal cycling, vibration, and electrical transients is mandatory.
What is the maximum steady-state power dissipation of the 1.5SMC120CH?
The 1.5SMC120CH has a steady-state power dissipation (PD) of 6.5 W at TA = 25°C. This rating applies only to continuous DC or low-frequency conditions - transient suppression relies on the 1500W peak pulse rating, which is non-repetitive and subject to thermal derating above 25°C per Fig.2 in the datasheet.
How does the 1.5SMC120CH compare to the 1.5SMC120AH variant?
The 1.5SMC120AH has a tighter breakdown voltage range (114–126 V vs. 108–132 V for 1.5SMC120CH), higher VWM (102.0 V), and lower clamping voltage (165 V @ 9.5 A). Both share identical package, power rating, and qualification - choose 1.5SMC120AH when tighter VBR tolerance and lower clamping are required for precise voltage margining.
1.5SMC120CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 97.2V
- Voltage - Breakdown (Min):
- 108V
- Voltage - Clamping (Max) @ Ipp:
- 173V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC120CH FAQ
1.How can I place an order for 1.5SMC120CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5SMC120CH reliable?
The price and inventory of 1.5SMC120CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CH?
1.5SMC120CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5SMC120CH?
For technical support, including 1.5SMC120CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CH requirements.
6.How does Aetrix verify that 1.5SMC120CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5SMC120CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CH?
All 1.5SMC120CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5SMC120CH part is unused and in its original packaging.
Return procedure for 1.5SMC120CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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